Synthesis method for anionic polyacrylamide

A technology of polyacrylamide and synthesis method, which is applied in the direction of flocculation/sedimentation water/sewage treatment, dehydration/drying/concentrated sludge treatment, etc. It can solve the problems of long polymerization initiation time, increased production cost, long polymerization time, etc., and achieves The effect of short initiation polymerization time, reduction of production cost, and simplification of production process

Inactive Publication Date: 2012-07-18
CHONGQING UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

In these synthesis methods, most of them are initiated by heating, and their main disadvantages are: 1. The polymerization initiation time is long, such as the patent "preparation method of anionic polyacrylamide" with the publication number CN101735387A, which is prepared by polymerization Anionic polyacrylamide is obtained, which takes 1h to 5h, and the initiation of polymerization takes a long time
Another example is the patent "S

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 1:

[0017] In the first step, weigh out 5.0 g of monomer acrylamide, 2.0 g of acrylic acid and 2.0 g of 2-acrylamido-2-methylpropanesulfonic acid into a jar, add 0.1% of the total monomer mass of urea and 0.4% disodium ethylenediaminetetraacetic acid, add 51g deionized water, stir evenly, prepare an aqueous solution with a total monomer concentration of 15%;

[0018] In the second step, add sodium hydroxide-potassium dihydrogen phosphate solution to the monomer aqueous solution prepared above, and stir it evenly to adjust the pH of the system to 3; pour high-purity nitrogen into the solution to remove oxygen and quickly add Use 0.4% of the total monomer mass of the oxidant potassium persulfate and the reducing agent sodium sulfite solution, stir uniformly and seal, where the mass ratio of the oxidant to the reducing agent is 1:1;

[0019] The third step is to put the above-prepared mixture into an ultraviolet light reaction device under indoor ambient temperature, an...

Example Embodiment

[0022] Example 2:

[0023] In the first step, weigh 6.0g of monomer acrylamide, 1.0g of acrylic acid and 2.0g of 2-acrylamido-2-methylpropanesulfonic acid into a jar, add 0.3% of the total monomer mass of urea and 0.2 % Ethylenediaminetetraacetic acid disodium, add 27g deionized water, stir evenly, prepare an aqueous solution with a mass concentration of 30% total monomer;

[0024] In the second step, add potassium hydroxide-potassium dihydrogen phosphate solution to the monomer aqueous solution prepared above, and stir it evenly to adjust the pH of the system to 6; pour high-purity nitrogen into the solution to remove oxygen and quickly add The oxidizing agent ammonium persulfate solution and the reducing agent sodium sulfite solution with 0.4% of the total monomer mass are mixed uniformly and sealed, wherein the mass ratio of the oxidizing agent to the reducing agent is 1.5:1;

[0025] The third step is to put the above-prepared mixture into an ultraviolet light reaction device un...

Example Embodiment

[0028] Example 3:

[0029] In the first step, weigh 7.0g of monomer acrylamide, 1.0g of acrylic acid and 1.0g of 2-acrylamido-2-methylpropanesulfonic acid into a jar, add 0.2% of the total monomer mass of urea and 0.15 % Ethylenediaminetetraacetic acid disodium, add 13.5g deionized water, stir evenly to prepare an aqueous solution with a total monomer concentration of 40%;

[0030] In the second step, add sodium hydroxide-sodium dihydrogen phosphate solution to the monomer aqueous solution prepared above, and stir evenly to adjust the pH of the system to 7; pour high-purity nitrogen into the solution to remove oxygen and quickly add The oxidant ammonium persulfate solution and the reducing agent sodium bisulfite solution with 0.2% of the total monomer mass are mixed uniformly and sealed, where the mass ratio of oxidant to reducing agent is 2:1;

[0031] The third step is to put the above-prepared mixture into an ultraviolet light reaction device under indoor ambient temperature, irr...

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Abstract

The invention relates to a synthesis method for anionic polyacrylamide. The synthesis method comprises the following steps of: adding a solubilizer and a chelant to three monomer aqueous solutions of acrylamide (AM), acrylic acid (AA) and 2-acryloyl-2-methyl-propyl sulfonate (AMPS); regulating the pH value of the reaction system with a buffer solution; successively adding an oxidizing agent and a reducing agent under the protection of nitrogen; introducing nitrogen for a period of time continuously; stopping introduction of the nitrogen and sealing; and initiating a polymerization reaction under the irradiation of ultraviolet light of certain wave length to generate gommures. The polymerization initiating time of the synthesis method is short, and heating or cooling control is not needed, so that the production process is simplified, the energy consumption is reduced, and the production cost is reduced.

Description

technical field [0001] The invention relates to a method for synthesizing an aqueous solution polymer, in particular to a method for synthesizing an anionic polyacrylamide. Background technique [0002] Polyacrylamide (PAM), as a kind of water-soluble polymer with special functions, has excellent physical properties, such as thickening, flocculation and sedimentation, filtration, resistance reduction, stabilization, viscosity increase, retention and purification, etc. According to the ionic characteristics, it can be divided into four types: non-ionic (NPAM), anionic (APAM), cationic (CPAM) and amphoteric. It is widely used in petroleum, water treatment, papermaking, mineral processing, coal washing, medicine, chemical industry, textile, agriculture and Water conservancy and other fields have broad application prospects. [0003] At present, the synthesis methods of anionic polyacrylamide in my country are mainly divided into: homopolymerization post hydrolysis method, homo...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/06C08F220/58C08F2/48C02F1/56C02F11/14
Inventor 郑怀礼卢伟马江雅陈雨喆魏占超陈伟孙永军
Owner CHONGQING UNIV
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